Called the Bioforce, this control pad promises all the familiar buttons and functions found in most controllers, but with one essential addition: electric shock.

For the chart nut, it's an essential addition to the library.

The sound programmers quick reference is an essential addition to your technical library.

Better than it has any right to be, but far from an essential addition to their catalogue.

Helleborus niger, the Christmas rose, is also an essential addition, with its drooping white flowers and golden stamens.

An essential addition to any fan's collection, regardless of whichever Danzig era is your favorite.

An essential addition to take into the workplace these days for that "interview" when you job gets regraded, re-aligned or "rationalised"

An essential addition to any collection - amazing barely begins to cover it.

This would be an essential addition to the list of Community objectives to improve air quality and promote public health in the Member States.

Kris was an essential addition for her knowledge of the city and familiarity with the flitters.